This is an online interpersonal perspectives course designed to assist Missouri police in handling persons with mental illness. The lesson explores why the issue of mental illness is important to the law enforcement community, by examining the prevalence of mental illness in the United States population and specific encounters between persons with mental disorders and law enforcement officers. The lesson examines the symptoms of various mental disorders, including depression, bipolar disorder, anxiety disorders, obsessive-compulsive disorder, hoarding disorder, post-traumatic stress disorder, schizophrenia, and personality disorders. The lesson provides detailed tips for recognizing a person with mental illness and guidelines for interacting with or handling persons with mental illness. Finally, the lesson explains Missouri’s involuntary detention procedures.